Flutter Force Directed Graph is a high-performance, customizable Flutter package that helps you create force directed graph visualizations in your Flutter applications.

• Create a force directed graph with customizable nodes and edges.
• Add, remove or update nodes and edges dynamically.
• Use the provided ForceDirectedGraphWidget for easy integration into your app.
• Built-in gesture detection for nodes, edges and graph panning and zooming.
• Comes with a ForceDirectedGraphController for easy management of the graph’s state.

Add the following in your pubspec.yaml file under dependencies:

dependencies:
  flutter_force_directed_graph: ^1.0.6

Then install it by running flutter pub get in your terminal.

Here’s a basic example on how to use the ForceDirectedGraphWidget and ForceDirectedGraphController.

import 'package:flutter_force_directed_graph/flutter_force_directed_graph.dart';

ForceDirectedGraphController<int> controller = ForceDirectedGraphController();

final fdgWidget = ForceDirectedGraphWidget(
  controller: controller,
  onDraggingStart: (data) {
    print('Dragging started on node $data');
  },
  onDraggingEnd: (data) {
    print('Dragging ended on node $data');
  },
  onDraggingUpdate: (data) {
    print('Dragging updated on node $data');
  },
  nodesBuilder: (context, data) {
    return Container(
      width: 24,
      height: 24,
      alignment: Alignment.center,
      color: Colors.red,
      child: Text('$data'),
    );
  },
  edgesBuilder: (context, a, b, distance) {
    return Container(
      width: distance,
      height: 16,
      color: Colors.blue,
      alignment: Alignment.center,
      child: Text('$a <-> $b'),
    );
  },
);

For a more detailed example, please view the example directory in this repository. This example includes additional features and gesture support.

We welcome contributions! If you find a bug or want a feature that isn't yet implemented, feel free to open an issue. If you want to contribute code, feel free to open a PR.

If you have any questions or need further guidance, please open an issue and we'll be glad to help out.

This project is licensed under the BSD 3-Clause License - see the LICENSE file for details.